Perhaps you should try some spelling variations:
dinh vai » dinh van, dinh vi, dinh va
tu sach » thu sach, su sach, te sach
ky mang » ky nang, ke mang, ky dang
may hoa » may khoa, ma hoa, day hoa
hieu ve » hieu va, hieu van
sach ky » sac ky, sach y, sach ty
cua tu » cua tuc, cua su, cua cu
tuc va » thuc va, truc va, tuc xa
xuc va » duc va, luc va, xac va
ve cac » va cac, vien cac

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ky mang may hoa. hieu ve cac ((xuc va) OR (tuc va)) dinh vai ((cua te) or (cua tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky mang may hoa. hieu ve cac ((xuc va) OR (tuc va)) dinh vai ((cua te) OR (cua tu)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky mang may hoa. hieu ve cac ((xuc va) OR (tuc va)) dinh vai ((cua te) or (cua tu))".
• Adding a wildcard symbol may retrieve word variants: tu sach ky mang may hoa. hieu ve cac ((xuc va) OR (tuc va)) dinh vai ((cua te) or (cua tu))*.